const path = require('path');
const HTMLWebpackPlugin = require('html-webpack-plugin');
const {CleanWebpackPlugin} = require('clean-webpack-plugin');

module.exports = {
    mode: 'development',
    entry:"./src/index.ts",
    output:{
        path:path.resolve(__dirname,'dist'),
        filename:"bundle.js",
        environment:{
            arrowFunction:false,
        }
    },
    module:{
        rules:[
            {
                test:/\.ts$/,
                use:[
                    {
                        loader:'babel-loader',
                        options:{
                            presets:[
                                [
                                    "@babel/preset-env",
                                    {
                                        targets:{
                                            "chrome":"88"
                                        },
                                        "corejs":"3",
                                        "useBuiltIns":"usage",
                                    }
                                ]
                            ]
                        }
                    },
                    'ts-loader'
                ],
                exclude:/node-modules/
            },{
                test:/\.less$/,
                use:[
                    "style-loader",
                    "css-loader",
                    {
                        loader:"postcss-loader",
                        options:{
                            postcssOptions:{
                                plugins:[
                                    [
                                        "postcss-preset-env",
                                        {
                                            browsers:'last 2 versions'
                                        }
                                    ]
                                ]
                            }
                        }
                    },
                    "less-loader",
                ]
            }
        ]
    },
    plugins:[
        new HTMLWebpackPlugin({
            template:"./src/index.html"
        }),
        new CleanWebpackPlugin(),
    ],
    resolve:{
        extensions:['.ts','.js']
    }
}